Enable sieve and move spam to Junk

config/dovecot/after.sieve

@@ -0,0 +1,5 @@
+require ["fileinto", "envelope", "mailbox"];
+
+if header :contains "X-Spam-Flag" "YES" {
+  fileinto :create "Junk";
+}

config/dovecot/dovecot.conf

@@ -17,6 +17,26 @@ mail_gid = mail
 mail_privileged_group = mail
 mail_access_groups = mail
 
+namespace inbox {
+  inbox = yes
+  mailbox Trash {
+    auto = subscribe
+    special_use = \Trash
+  }
+  mailbox Drafts {
+    auto = subscribe
+    special_use = \Drafts
+  }
+  mailbox Sent {
+    auto = subscribe
+    special_use = \Sent
+  }
+  mailbox Junk {
+    auto = subscribe
+    special_use = \Junk
+  }
+}
+
 ###############
 # TLS
 ###############
@@ -80,9 +100,7 @@ service imap-login {
 ###############
 
 protocol lmtp {
-}
-
-protocol lda {
+  mail_plugins = $mail_plugins sieve
   recipient_delimiter = +
 }
 
@@ -108,16 +126,13 @@ service dict {
 service managesieve-login {
 	inet_listener sieve {
     port = 4190
-  }
-	inet_listener sieve_deprecated {
-    port = 2000
   }
 }
 
 plugin {
 	sieve = ~/.sieve
 	sieve_dir = ~/sieve
-	sieve_before = /var/lib/dovecot/sieve/before.sieve
-	sieve_default = /var/lib/dovecot/sieve/default.sieve
-	sieve_after = /var/lib/dovecot/sieve/after.sieve
+	sieve_before = /etc/dovecot/before.sieve
+	sieve_default = /etc/dovecot/default.sieve
+	sieve_after = /etc/dovecot/after.sieve
 }